The authors wish to make the following correction to this paper: the correct number of the project granted by the Czech Science Foundation is P108/12/1872.

Acknowledgments

The feedstock material was supported by the project TA01010878 grantedby the Technology agency of the Czech Republic. The analytic techniques were supported by the Czech Science Foundation under the project P108/12/1872. The authors thank J. Šimek and M. Munzar (SAM holding, Miletín, Czech Republic) for spraying the samples.